<style>
.caret-down:after,
.caret-up:after,
.caret-left:after,
.caret-rigth:after {
  position: relative;
  content: ' ';
  display: inline-block;
  width: 0;
  height: 0;
  border: .3rem solid transparent;
  vertical-align: middle;
  margin-left: .25rem;
}
.caret-down:after {
  border-top-color: #03A9F4;
  top: .1rem;
}
.caret-up:after {
  border-bottom-color: #03A9F4;
  bottom: .1rem;
}
.caret-left:after {
  border-right-color: #03A9F4;
  right: .1rem;
}
.caret-rigth:after {
  border-left-color: #03A9F4;
  left: .1rem;
}
</style>
<div class="content">
  <div class="list">
    <div class="item">
      <div class="content">
        <div class="row">
          <div class="cell"><div class="caret-down">天天向下</div></div>
          <div class="cell"><div class="caret-up">天天向上</div></div>
          <div class="cell"><div class="caret-left">天天向左</div></div>
          <div class="cell"><div class="caret-rigth">天天向右</div></div>
        </div>
        <div><pre class="prettyprint"><code>&lt;div class=&quot;caret-down&quot;&gt;&#x5929;&#x5929;&#x5411;&#x4e0b;&lt;/div&gt;
&lt;div class=&quot;caret-up&quot;&gt;&#x5929;&#x5929;&#x5411;&#x4e0a;&lt;/div&gt;
&lt;div class=&quot;caret-left&quot;&gt;&#x5929;&#x5929;&#x5411;&#x5de6;&lt;/div&gt;
&lt;div class=&quot;caret-rigth&quot;&gt;&#x5929;&#x5929;&#x5411;&#x53f3;&lt;/div&gt;</code></pre></div>
        <div><pre class="prettyprint"><code>.caret-down:after,
.caret-up:after,
.caret-left:after,
.caret-rigth:after {
  position: relative;
  content: ' ';
  display: inline-block;
  width: 0;
  height: 0;
  border: .3rem solid transparent;
  vertical-align: middle;
  margin-left: .25rem;
}
.caret-down:after {
  border-top-color: #03A9F4;
  top: .1rem;
}
.caret-up:after {
  border-bottom-color: #03A9F4;
  bottom: .1rem;
}
.caret-left:after {
  border-right-color: #03A9F4;
  right: .1rem;
}
.caret-rigth:after {
  border-left-color: #03A9F4;
  left: .1rem;
}</code></pre></div>
      </div>
     </div>
  </div>
</div>
